Lowsider: Right-click the network icon in the tray. Select Open Network and Sharing Center. In the left hand pane, click Change Adapter Settings. Right-click your adapter and select Properties, then Configure, then the Advanced tab. Scroll down and you'll see the option (probably last in the list).
Boogieman: I've been sniffing around on the Intel site and there are some drivers
which appear to be newer, but installation fails -- "not compatible with this operating system".
Hopefully the white coat guys are working on a Windows 7-compatible update.